Number of Achievements: 54

Beat game:
Must play on Proud mode for One Play-through or New Game Plus and re-grind out all abilities on second play-through.
Ability Ace: Max out and install all Support and Spirits abilities.
*Special Note brought up by a comment*:
"If you don't want to play on proud mode to get Ability ace because you do need to activate Exp Zero, What you can do is play on New Game +. There you can activate Exp Zero, Or play the game on proud mode. You will need to re-grind out abilities on all Spirits."

What carries over in New Game +?
All spirits reset to level 1
Parts of these section:
Story
Character Files
Trophies
Glossary
The Mementos
Finally for items you only get recipes.

Complete Worlds:
Mark of Mastery: Defeat the phantom Ursula and begin the Mark of Mastery exam.
A Divided World: Complete Traverse Town as both Sora and Riku.
Dark Intervention: Complete La Cité des Cloches as both Sora and Riku.
Memory and Heart: Complete The Grid as both Sora and Riku.
Inhabitants of the Sleeping Worlds: Complete Prankster's Paradise as both Sora and Riku.
Distinct Worlds: Revisit and complete Traverse Town as both Sora and Riku.
All for One, and One for All: Complete Country of the Musketeers as both Sora and Riku.
A Sound Idea: Complete Symphony of Sorcery as both Sora and Riku.
The Depths of Darkness: Complete The World That Never Was as both Sora and Riku.

Special Portals:
Champions of All Districts: Complete all Special Portals in Traverse Town as both Sora and Riku.
Champions of the Cathedral: Complete all Special Portals in La Cité des Cloches as both Sora and Riku.
Champions of the Digital World: Complete all Special Portals in The Grid as both Sora and Riku.
Champions of the Endless Ocean: Complete all Special Portals in Prankster's Paradise as both Sora and Riku.
Champions of the Opéra House: : Complete all Special Portals in Country of the Musketeers as both Sora and Riku.
Champions of the Harmonic Score: Complete all Special Portals in Symphony of Sorcery as both Sora and Riku.
Champions of the Dark City: Complete all Special Portals in The World That Never Was as both Sora and Riku.
Brave Challengers: Complete all 7 Link Portal bonus objectives.
Seekers of Secrets: Complete all Secret Portals as both Sora and Riku.

Collection:
Record Keeper: Achieve 100% completion in Combat, Story, Items, and Game Records.
Star Combatant: Achieve 100% completion in Combat.
Storyteller: Achieve 100% completion in Story.
Item Collector: Achieve 100% completion in Items.
Loyal Customer: Make a purchase at every Moogle Shop.
Command Collector: Obtain all commands.
Recipe Collector: Obtain all recipes.
Dream Piece Collector: Obtain all Dream Pieces.
Nostalgic: View all flashbacks.


Dream Eater:
Easy as 1-2-3: Create a party with 3 Spirits.
True Trainer: Use every Training Toy.
Happy Campers: Create a party with 3 Spirits and make them all very happy.
Kindred Spirits: Max out a Spirit's Affinity Level.
Golden Egg: Breed a ★ Rank Spirit.
Strongest Link: Unlock all nodes on any Spirit's Ability Link board.
Lifesaver: Rescue Spirits 3 times in battle.



Diving:
Droplet Magnet: Rack up 300 or more Drop Points in a single turn.
Dream Dropper: Drop 100 or more times.
Deft Diver: Complete a dive without taking damage.
Ace Diver: Perform an A-Rank dive.

Mini Games:
Flick Rush Fever: Achieve a Rush Level of 20.
Medal Master: Obtain 3,000 or more medals in Flick Rush.
Lucky Seven: Win a Flick Rush duel by lining up three 7s.
Super Cyclist: Earn a score of 1,000 or higher on the Light Cycle.
Balloon Master: Earn a score of 200 or higher in the Balloon mini-game.
Water Barrel Master: Earn a score of 400 or higher in the Water Barrel mini-game.
Candy Goggles Master: Earn a score of 800 or higher in the Candy Goggles mini-game.
Level Masters: Achieve a cumulative level of 100.

Combat Achievements:
Bull's-Eye: Defeat 5 or more enemies with a single hit in Slingshot.
Sliding By: Connect 6 or more points with a single Faithline.
Super Hacker: Activate all Code Break commands.
Bubble Burster: Trap 6 or more enemies in Bubble Burst.
Comic King: Activate all of Wonder Comic's effects at least once.
Maestro: Defeat 4 or more enemies in one turn of Melody Catcher.
Chain Reaction: Sever all chains with a single slash 3 times in a row using Nightmare's End or Mirage Split.

Achievements if played in ordered of recommended play-through by end of this game: 54/69

Number of Achievements: 15

Beat Game:
Proud Player/Critical Competitor: Complete the game in Proud or Critical Mode.
Undefeated: Complete the story without having to Retry or Continue after being defeated.

Complete Worlds:
Wandering in the Dark: Begin a journey to escape the Dark World.
Flow of Time: Complete the Castle Town episode.
False Temptations: Complete the World Within episode.
Real or Illusion?: Complete the Forest of Thorns episode.
Into the Depths of Darkness: Complete KINGDOM HEARTS 0.2 Birth by Sleep - A fragmentary passage -.

Collection:
Treasure Hunter: Open all treasure chests in the Dark World.
Ambitious: Complete all objectives.

Assorted End Game Achievements:
Heartless Hunter: Defeat 500 Heartless.
Ice Queen: Execute Spellweaver's Finish command 5 times.
A Magical Finale: Execute all Magic Situation Commands.
Shotlock Star: Earn an Excellent rating in Shotlock.
Dark Explorer: Walk a long distance within a single map.
Fashionista: Equip an item in all wardrobe slots.

Achievements if played in ordered of recommended play-through by end of this game: 69/69

Kingdom Hearts 1.5+2.5 Final Mix Achievements Guide: https://steamproxy.com/sharedfiles/filedetails/?id=3269543411
Kingdom Hearts 3 + Remind Achievements Guide: https://steamproxy.com/sharedfiles/filedetails/?id=3273467210